A haunting deserted hotel is a favorite with artists and photographers.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The only museum with its curator—and her pets—buried inside.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

This is the oldest Roman-made bridge in the city still existing in its original state.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A statue representing a lost Roman profession that was vandalized for centuries.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The final resting place of the poets Shelley and Keats.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This statue is the only female representation of Rome's "talking statues."